Britney Spears

COURTESY OF KABC TELEVISION/AFP/GETTY IMAGES

Britney may have been a part of the blonde pop princess phase of the late 1990s with Christina Aguilera, Jessica Simpson and Mandy Moore, but Spears' biggest hair moment came when she shaved her head in 2007.

Britney may have been a part of the blonde pop princess phase of the late 1990s with Christina Aguilera, Jessica Simpson and Mandy Moore, but Spears' biggest hair moment came when she shaved her head in 2007. (COURTESY OF KABC TELEVISION/AFP/GETTY IMAGES)

Britney may have been a part of the blonde pop princess phase of the late 1990s with Christina Aguilera, Jessica Simpson and Mandy Moore, but Spears' biggest hair moment came when she shaved her head in 2007.